使用 OpenSSL C++ 库和 PHP 的 Blowfish 加密数据不一致
我正在尝试开发一个 C++ 程序来加密一些数据，以便稍后使用基于 PHP 的 Web 服务进行解密。但是，我在使用 PHP 中的 openssl_decrypt() 方法使用 Blow-fish CBC 方法使用 PHP 解密数据时遇到问题。
我正在测试此代码 C++ 代码以加密消息并转换为 base64 格式以使用我的 PHP 程序解密。这是 C++ 程序的代码。
#include <secureinfra.hpp>
#include <iostream>
int main()
{
cout << "Unit Test for the crypto system" << endl;
SecureInfrastructure mySec;
/* A 256 bit key and IV */
auto *key = (unsigned char *)"ZdOAq0yn6H1i35TywbLrtqBO4NCjh7Vh";
auto *iv = (unsigned char *)"01234567";
/* Message to be encrypted */
auto *plaintext = (unsigned char *)"The quick brown fox jumps over the lazy dog";
/* Buffer for ciphertext. Ensure the buffer is long enough for the ciphertext which may be longer than the
* plaintext, depending on the algorithm and mode. */
unsigned char ciphertext[128];
/* Buffer for the decrypted text */
unsigned char decryptedtext[128];
int decryptedtext_len, ciphertext_len;
/* Encrypt the plaintext */
ciphertext_len = mySec.EncryptMessage(plaintext, strlen((char *) plaintext), key, iv, ciphertext);
/* Decrypt the ciphertext */
decryptedtext_len = mySec.DecryptMessage(ciphertext, ciphertext_len, key, iv, decryptedtext);
/* Add a NULL terminator. We are expecting printable text */
decryptedtext[decryptedtext_len] = '\0';
return 0;
}
但是，PHP 程序无法解密由我的 C++ 程序生成的 $ciphertext。当我尝试回显 $original_plaintext 时，它什么也没显示。
另外，我注意到使用 SSL 的 PHP 和 C++ 加密是不同的。例如，当我尝试使用 PHP（使用 openssl_encrypt 方法）和 C++ 加密短语“The quick brown fox jumps over the lazy dog”时，使用相同的密钥和 IV，加密的 base64 字符串如下：
在 C++ 中：
ljRvLcfBiDwxRSm1lDXMwDk5S4pRCg9D2F9jxR5C5yy79xoBHQNKjA/FaQ2dNfKvyH3brAV/
在 PHP 中：
hWj7F1fnBXhIWv4sonjhSmJgHWJALFecxxrGe0T1kLrN4TfSMUw/uELj6h5+Laph
我应该如何解决这个问题？我看到一篇类似的帖子描述了我需要在 C++ 程序上设置密钥大小，但我不确定如何正确执行此操作。
慕姐8265434浏览 532回答 2
2回答
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慕标5832272
当前的 C 实现假定具有固定密钥长度的密码，这不适用于Blowfish。对于具有可变密钥长度的密码，将其设置为某个值，例如 32 字节，EVP_EncryptInit_ex(ctx, EVP_bf_cbc(), NULL , key, iv);必须替换为EVP_EncryptInit_ex(ctx, EVP_bf_cbc(), NULL, NULL, NULL);EVP_CIPHER_CTX_set_key_length(ctx, 32);EVP_EncryptInit_ex(ctx, NULL, NULL, key, iv);在EncryptMessage，例如这里。并且类似地也与解密。那么 C 代码和 PHP 代码的结果是相同的。 -
侃侃无极
我是一名 PHP 开发人员，所以不能对 C++ 方面的事情发表太多评论。但是，我已经使用 PHP 7.2.10 对此进行了测试，并且得到了相同的结果。如果你换成你$ciphertext给的值，hWj7F1fnBXhIWv4sonjhSmJgHWJALFecxxrGe0T1kLrN4TfSMUw/uELj6h5+Laph然后执行它确实会给你的脚本：“敏捷的棕色狐狸跳过了懒狗”因此，您的 PHP 脚本完全没有问题。问题在于，就 PHP 中的解密实现而言，您提供的哈希（由 C++ 程序生成）不正确。如果你var_dump($original_plaintext);在 PHP 脚本中这样做，它会返回 false，这证实了这一点。您的 C++ 程序在哪里告诉它使用 Blowfish CBC？我可以看到您在 PHP 脚本中使用 的位置执行此操作$cipher，但在 C++ 中没有。PHP 中没有一种密码方法可以为您提供该哈希值。作为测试，使用显示方法名称（来自openssl_get_cipher_methods()）和哈希的此脚本：<?phperror_reporting(E_ALL);$methods = openssl_get_cipher_methods();foreach ($methods as $method) { echo $method . "\n"; echo openssl_encrypt("The quick brown fox jumps over the lazy dog", $method, "ZdOAq0yn6H1i35TywbLrtqBO4NCjh7Vh", 0, "01234567"); echo "\n\n----\n\n";}?>输出：AES-128-CBCCFqD8KvYNNSLRRH5leJm9jLq4japdiZODU959rRx4E1IyGcpCfG9VezF0IdsWPDy----AES-128-CBC-HMAC-SHA1CFqD8KvYNNSLRRH5leJm9jLq4japdiZODU959rRx4E1IyGcpCfG9VezF0IdsWPDy----AES-128-CBC-HMAC-SHA256CFqD8KvYNNSLRRH5leJm9jLq4japdiZODU959rRx4E1IyGcpCfG9VezF0IdsWPDy----AES-128-CFBKjdp5YLSCjWqYRPiWAi7vWJt3ui+NZnJXSL4dBdNEaIWyK2AeQIm2If0Mg==----AES-128-CFB1PsQSrHSFqXuZVZgtNXMSvwsdhhmxfw2MJgPmf/I++n1jmb0QZfRpSulHCg==----AES-128-CFB8KmQC+qe1l5iIeQk4MdBwkQlzvcmNCZH3EhxCCP1P7I2CrZAjE0G0NDQ24Q==----AES-128-CTRKjdp5YLSCjWqYRPiWAi7vVxK24U+JACgW6KCrbnVwTBQrBy/dUPI6RxNag==----AES-128-ECBTGwrUkmBrlam+I/4nL/KXXILZKdb5FKDpo+BSYMYe+z90MSzX75nkQXhRund4wCF----AES-128-OFBKjdp5YLSCjWqYRPiWAi7vV7oblWo5p+Us1m5FA0+R8nb7EE3cOXI6O7RCg==----AES-128-XTSOfhfg4ruiwKduK+6wC01olTA4XVY90bFBYfd+0QJgqs6O2OKrhhd3gRWMQ==----AES-192-CBC9PoANX4yywNkBNFCcX++qXST7xumUwIU0BIAwe4npwLNmeSC7MsYOsawg/+RztyV----AES-192-CFBwjxuTYax9f6jWWvKmidXvucLDzRNR/l5srv5KKVIPphruAhPnKQ23+Vspw==----AES-192-CFB16jB9HioMtoi3MZky0B8M01W1l2SqR6ZvtL3I8WEClcIdMXYFnjdP50o2Nw==----AES-192-CFB8wvw3vpDpqPTInjIuFEAhWwKlwrekcpc4Q7X7ApRKjHT1a+WDkME7Hz/u3A==----AES-192-CTRwjxuTYax9f6jWWvKmidXvibXdkK8UNq9ZX8bAsh6OcN1jD2UcFHuf0X5IA==----AES-192-ECBbAzuDIkfDbJNXkWNtovgH3UPoh+jRoq1kUxfomAHMPGxDbBWc4bDDrrEvWHkTqYM----AES-192-OFBwjxuTYax9f6jWWvKmidXvspHO1k5ImnLwNgWM+lB6brfjPT78myhmkK35w==----AES-256-CBCjLxnUq0bKY2//CwBFeZoqy3u7s8E7aQ0PEm/5vPHR4/a2TVylXu5n2o2x7pu8SRq----AES-256-CBC-HMAC-SHA1jLxnUq0bKY2//CwBFeZoqy3u7s8E7aQ0PEm/5vPHR4/a2TVylXu5n2o2x7pu8SRq----AES-256-CBC-HMAC-SHA256jLxnUq0bKY2//CwBFeZoqy3u7s8E7aQ0PEm/5vPHR4/a2TVylXu5n2o2x7pu8SRq----AES-256-CFB9cmTuo3iisXBbJzWFWCmgl/7mZ20LODkcqP+GNf7r9zzJy7pskvGE3h8+Q==----AES-256-CFB1y0D9Yj1ymwYVIrQx64nehgeoydPk9xB++McXmSz4lfZbNcBgL0fnlCxvNA==----AES-256-CFB89bXhDvqzPRmHQ7+8qpp7CxetEMKFzq8FsBJgdcVZPZ+Xno11RbD+l8wAwg==----AES-256-CTR9cmTuo3iisXBbJzWFWCmgqyMguKt3NJv/vh9Z+E/5o7jbmGIjLZKA7+QRg==----AES-256-ECBXe6luPVXEqvvTVEfNuO281ofcW+uV682D4fYYIyA7KHDcQkVHi647wSFaXqIxwZP----AES-256-OFB9cmTuo3iisXBbJzWFWCmgvMTTvnu1bC8K4cxVlI7G3wxZw6H/z/OU8fUSg==----AES-256-XTS7sP5mx9ES7JypAiqeC+ZXvu70gnNnOiPGMFRhwh14xNZiXRX2/FUTEYKLA==----BF-CBChWj7F1fnBXhIWv4sonjhSmJgHWJALFecxxrGe0T1kLrN4TfSMUw/uELj6h5+Laph----BF-CFBDtWBgA7jjoOOCHfIg+EvlWURlgrbYWM/001bn4xRbvo9r8sOoOdSAzoTsA==----BF-ECBGEPm0Nw/TGb9XI00QGbMOZhSltrgjLQLcS1rjyLB+Ti8DTfIoDmkvJGqAyoJd0LY----BF-OFBDtWBgA7jjoPFFmYP7IlPTkdCaP+8eY/rgB0M/12zCLTqPHerQV77Ar8L+g==----CAMELLIA-128-CBCiVUMSil3yWiIY9go7atWvrd/mSOtQPKmPnoxYg+B7pwevLuC0Y5RLchGEGn0cgZb----CAMELLIA-128-CFB6HYrCV2MPk3sn3oNWm0xLQarvqJ2dSgRDU/1N0tP0HnA4X+XYEvjd4d7ug==----CAMELLIA-128-CFB1rsMnrvOE/y0VIFH0/SVB5FJG6X6sK6ads+TiH9UM2X42U+hRbqIRT+cdgg==----CAMELLIA-128-CFB86NRTf6JBm71uVIZzK1DLr799SKaD3UxT5cPFne3xSFuWPb9Mnn2riFz6oA==----CAMELLIA-128-ECBespelBrXu4iWaxp2RZSLPyoSlck4G6ylQYHcu6zITMhmV9sMTEcUcKlZP71HYhQr----CAMELLIA-128-OFB6HYrCV2MPk3sn3oNWm0xLbgO3psDlQMt7zbaA/coaJvIVJqzAaSaY6BSgA==----CAMELLIA-192-CBCuz9Z+IX+P+CpQLBepmI3A9rU6Wcg1CsikKYglNU4SY3hlVOsT6PXD+hKXOobioPZ----CAMELLIA-192-CFBtrJ5LHzk0Y/T2TCcR6/daZ78aDxU1dJgRA6+VXU1uqFQovtUo0QRrgiCZg==----CAMELLIA-192-CFB17LLnnwpBpBkaFXrWw5qegx8KVvEgV2/VR362V5Z43qNJVPzzdvmcFjv9Vg==----CAMELLIA-192-CFB8tiogUjGFA+o7MOCoACibq7PfIaV4Pgj2Js4La4SqAn6262b7b4AAfvUDbQ==----CAMELLIA-192-ECBsn9QfT8PQrMrNxAR9pBT3QVNLdOyhYLKBb1joqmoOW7wzJZ7zW7P070ErkJPkMYU----CAMELLIA-192-OFBtrJ5LHzk0Y/T2TCcR6/dafYXU4/u9aln1U/6GzytlRC8Onnw54/t5/slvA==----CAMELLIA-256-CBCKlj37OGl6nexwkw5ZgKSUgTQvAubQYKQeMjX2jMA0LDhaAxr38y91bU3dCwV6xYt----CAMELLIA-256-CFBxlQLgvFHyLYmrl3plKqarQUU8dYdC0Qt0dKg6Z38KQGl0yoh5jIPtzIluA==----CAMELLIA-256-CFB1gxGv92PY0eNcmtYGvdeGKveygkiBiejcckETUkVAVbYXiZO6xvFYnETR0Q==----CAMELLIA-256-CFB8xjARmxeN+O730AwGfWzJaHReUxu28PAzniDHh99SFKnwAww9Iy5wtbpsCg==----CAMELLIA-256-ECBM/P3GH8xSUn4bPPmD7rKupqYS6VG8nSsW65PmvuzZ7L4PJtaOGLMpqx72Wo2F2F1----CAMELLIA-256-OFBxlQLgvFHyLYmrl3plKqardbHfL3lWaw0Ki9U5svO8pXQgTzUJ0jibbOI/g==----CAST5-CBC/XDmMTtfxYk5R+zx0Qg9B0ohoAT0kr/lRJB0OIiM7PlQqMDhM/bH2iF59qYPWn8F----CAST5-CFBqjxQUjVCFHtoSyLDOL6BYUGggJ95TJn0zPD/jevMKetvCjfCOOvWHvmBOw==----CAST5-ECBJZiSJA0Sgs6A+x5U0pffRC/cMgWmHEMptZ4JrLQ5rCvNhLj65aQryWDJDRtesuk3----CAST5-OFBqjxQUjVCFHs3AVHEDgPNF7R40LDHvYDeXna+4QIFWETaoBOplIIcW5BN5g==----DES-CBCVTSvIBHq5AqT3GZ7J3qEt1CGwYCCk7gUpyBTLhgC4kqXdzaOs2TuekAIhmRyZZ9Y----DES-CFBZ6znWp6g7hyOaZpvk9+24Vls+6JaUA+sgIR9h0bWAlqby7oR/fX4k2wy1A==----DES-CFB1fpU6lGqFl6kkQtXuv6XM112vT2CIVEV9iTnSkXd+Zrk7T065215LqO+nzA==----DES-CFB8Z2cEx6sPTs5lDZRq8Ejp2zhR8JbdcoqdKMTHDHA/Q5QA8/B036OKVr3QkQ==----DES-ECBVegFycZ1wAWwrzv0AhpJQ6mFzWr+SK6ecIyqN8iBXfFtXa3eE/4+iSKCEBXCdEfj----DES-EDEbb85G6G8tchhxlIYF8vLpcChFtSC7Iuyywn4tssj7LP/8PHdTWZWKOJDN8NsY3Kw----DES-EDE-CBC0nWlfDQeBtrWN2xZ1JqPl+fTeTfdrp2/bBWFTtpMcsV1Btz8UaN/YPHJ45/qJlrI----DES-EDE-CFBsQ4TEmNrEW2T6C0wYabfGaYpwg69dOE9EZXzA7qt0JGctgiSzXwq3HT11w==----DES-EDE-OFBsQ4TEmNrEW2mZc8ckaETVTWG+AFgiyykc68CWoiwNxuRYyVDCnrYvGS/WQ==----DES-EDE3dzCgZyS9ovD+632p+bJy476BXmaNAKj8qA9xAClHrIgDyaQ0aOhLgFQU9dk7XItN----DES-EDE3-CBCfAngoyT1z6mLk/y1068+0Zr2293p+4K7/JoQu5KRu3WgQJTRV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++程序中的散列其他的东西比"The quick brown fox..."。我能想到的最好的调试方法——就像在 PHP 中的情况一样——是ciphertext在 C++ 脚本中尽可能多的地方输出变量。
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